#include <stdio.h>

int min(int a,int b);
int main(){
	int h,w,a,b,s;
	
	do{
		s = scanf("%d %d %d %d",&h,&w,&a,&b);
		if (s != EOF){
			if ((a<b?a:b) <= sqrt(h*h*1.0 + w*w*1.0)){
				printf("Just do it.\n");
			}else{
				printf("We have a problem.\n");
			}
		}
	}while (s != EOF);
	return 0;
}

